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4.1 Basis of Classification. 4.2 Classification of Animals. When you look around, you will observe different animals with different structures and forms. As over a million species of animals have been described till now, the need for classification becomes all the more important.
- Phylum Porifera
- Phylum Coelenterata
- Phylum Platyhelminthes
- Phylum Nematoda
- Phylum Annelida
- Phylum Arthropoda
- Phylum Mollusca
- Phylum Echinodermata
- Phylum Hemichordata
- Phylum Chordata
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Porifera means organisms with holes. They are commonly known as Sponges. Features of the poriferan are: 1. Non-motile, multicellular organisms with a hard outer skeleton. 2. Have a porous body. 3. Pores on the bodies create a canal system which helps in the circulation of substances. 4. Not differentiated into head and tail; do not have a well-deve...
The term Coelenteratais derived from the Greek word “kilos” which means hollow-bellied. Their features are: 1. Have a hollow body cavity. 2. The body is differentiated into two ends. 3. Includes all aquatic animals. 4. The body is made of two layers of cells: inner and outer linings. 5. Live in colonies (corals) as well as solitary (Sea anemone). E...
Platyhelminthes are commonly known as flatworms. Their features are: 1. Dorsoventrally flattened body. 2. Complex and have differentiated body structure. 3. Tissues are differentiated from three layers of cells and are triploblastic. 4. Do not have a true internal cavity or coelom. 5. Have bilateral symmetry. 6. Either free-living (Planaria) or par...
Phylum Nematoda consists of nematodes or roundworms. Their features are: 1. Nematodes have a cylindrical body. 2. Bilaterally symmetrical and triploblastic. 3. Have pseudocoelom, a false body cavity. 4. Parasitic and causes diseases such as elephantiasis, ascariasis. Examples of phylum Nematoda include – Ascaris, Wuchereria.
Annelids are commonly known as segmented or ringed worms. They have the following features: 1. Have a segmented cylindrical body. 2. The body is differentiated into head and tail. 3. Bilaterally symmetrical and triploblastic. 4. Have a true body cavity. 5. Habitat: marine, freshwater and land. Examples of phylum Annelida include – Earthworm, Leech.
Arthropod means jointed legs. Animals which have jointed appendages belong to this phylum. This is the largest phylum in the animal kingdom. Other features are: 1. They are bilaterally symmetrical. 2. Have jointed appendages, exoskeleton and a segmented body. 3. Have well-differentiated organ and organ system. 4. Have an open circulatory system, bu...
Phylum Mollusca consists of a large group of animals. Features are: 1. Bilaterally symmetrical and triploblastic. 2. Less segmented body. 3. Well-developed organ and organ system. 4. Typically, open circulatory system. 5. Limbs are present. Examples of phylum Mollusca include- Snails and octopus.
The term Echinodermata is derived from the Greek words, echinos meaning hedgehog and dermameaning skin. Thus, echinoderms are spiny-skinned animals. 1. Radial symmetry and triploblastic. 2. Have true coelom. 3. Have hard calcium carbonate skeleton structure. 4. Free-living marine animals. Examples of phylum Echinodermata include- Sea urchins, starf...
The characteristics of phylum Hemichordata are as follows: 1. The body is soft, fragile, and divided into a proboscis. 2. The epidermis is single-layered. 3. It comprises worm-like marine animals with an organ-system level of organization. 4. They have an open circulatory system. 5. They respire through gills since they are marine. 6. They have sep...
The Chordates possess the following characteristics: 1. They are bilaterally symmetrical, triploblastic with an organ-system level of classification. 2. They possess a notochord and a nerve cord. 3. The circulatory system is closed type. Phylum Chordata can be divided into the following sub-phyla: 1. Urochordata 2. Cephalochordata 3. Vertebrata Als...
Learn about the ten phyla of the animal kingdom, i.e., Kingdom Animalia, based on their body design and differentiation. See examples, features and characteristics of each phylum and subphylum with video lessons and quiz.
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Mar 11, 2016 · Classification of Animal Kingdom is based on various fundamental features like – Levels of Organisation, Symmetry, Diploblastic and Triploblastic Organisation, Coelom development, Segmentation of the body and ; Presense or absence of Notochord. The broad classification of Animalia based on common fundamental features: Levels of Organisation
Jul 12, 2022 · Biology definition: Kingdom Animalia is a taxonomic kingdom of living and extinct animals. Members of this kingdom are characterized by being eukaryotic, multicellular, heterotrophic, lacking a cell wall, and mostly are motile. Kingdom Animalia Classification. Let’s find out about the classification of animals.
- Domains. The domain is often called the least specific category of classification, and it regroups all of life. There are three main domains: Bacteria: for cells that don’t contain a nucleus.
- Kingdoms. There are in total six different kingdoms in which all living organisms can be classified. Here they are in more detail: Animalia. This kingdom is composed of eukaryotic, multicellular, organisms.
- Phylums. The next classification after the kingdom is phylum. There are 7 different phyla under which animal species are categorized. They include: Porifera.
- Classes. Classes come after the phylum, and they are more specific than the three first categories we’ve mentioned so far. We’ll narrow it down to the Chordata phylum, where there are seven classes
Learn about the features and evolution of animals, the multicellular heterotrophs that can move and reproduce sexually. Explore the hierarchical classification of animals based on their body plans and examples of different animal types.
May 27, 2024 · Animal Classification: The Six Different Animal Kingdoms. All living organisms can be placed in one of six different animal kingdom classifications. The characteristics of each animal kingdom are: Animal – A kingdom of complex multi-celled organisms that do not produce their own food. This kingdom contains all living and extinct animals.
